WO2018131800A1 - Method for transmitting and receiving signal in wlan system and device therefor - Google Patents

Abstract

The present specification discloses a method for transmitting and receiving a signal in a WLAN system, by a station, and a device therefor. More particularly, the present specification discloses, when a station transmits and receives a signal through a channel on which one or two channels are bonded, a method for constituting an enhanced directional multi gigabit (EDMG) short training field (STF) for an orthogonal frequency division multiplexing (OFDM) packet, and transmitting and receiving a signal comprising the constituted EDMG STF field, and a device therefor.

Description

Signal transmission and reception method in wireless LAN system and apparatus therefor

The following description relates to a method for transmitting / receiving a signal of a station in a WLAN system. More specifically, when a station transmits and receives a signal through a channel in which one or two channels are bonded, orthogonal frequency division multiplexing (OFDM) A method for configuring an EDMG (Enhanced Directional Multi Gigabit) EDF Short Training Field (STF) field for a packet, transmitting and receiving a signal including the configured EDMG STF field, and an apparatus therefor.

The standard for WLAN technology is being developed as an Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard. IEEE 802.11a and b are described in 2.4. Using unlicensed band at GHz or 5 GHz, IEEE 802.11b provides a transmission rate of 11 Mbps and IEEE 802.11a provides a transmission rate of 54 Mbps. IEEE 802.11g applies orthogonal frequency-division multiplexing (OFDM) at 2.4 GHz to provide a transmission rate of 54 Mbps. IEEE 802.11n applies multiple input multiple output OFDM (MIMO-OFDM) to provide a transmission rate of 300 Mbps for four spatial streams. IEEE 802.11n supports channel bandwidths up to 40 MHz, in this case providing a transmission rate of 600 Mbps.

The WLAN standard uses a maximum of 160MHz bandwidth, supports eight spatial streams, and supports IEEE 802.11ax standard through an IEEE 802.11ac standard supporting a speed of up to 1Gbit / s.

Meanwhile, IEEE 802.11ad defines performance enhancement for ultra-high throughput in the 60 GHz band, and IEEE 802.11ay for channel bonding and MIMO technology is introduced for the first time in the IEEE 802.11ad system.

In the 11ay system to which the present invention is applicable, the station may transmit and receive a signal through a channel in which one or two channels are bonded.

In this case, when the station transmits and receives a signal through the bonded channel, the present invention proposes a method and apparatus for configuring an EDMG STF field for an OFDM packet and transmitting and receiving a signal including the configured EDMG STF field. .

In one aspect of the present invention for solving the above problems, a method in which a first station (STA) in the WLAN system transmits a signal to a second STA through a channel bonded to one or two channels In Orthogonal Frequency Division Multiplexing (OFDM) based on the number of space-time streams and the number of channels included in the bonded channel to which an Enhanced Directional Multi Gigabit (EDMG) Physical Protocol Data Unit (PPDU) is transmitted. Generate an EDMG STF (Short Training Field) field sent in mode; And transmitting an EDMG PPDU including the EDMG STF field transmitted in the OFDM mode to a second STA through a space time stream in which one or two channels are bonded. In this case, the EDMG STF sequence for each space time stream included in the EDMG STF field is composed of {A, 0, 0, 0, B}, and A and B differ according to the number of channels included in the bonded channel. Represents a sequence having a length, wherein A and B of each spatial temporal stream are orthogonal to A and B of another spatial temporal stream, respectively, and a nonzero value included in A and B is the number of channels included in the bonded channel. The values of the first sequence and the second sequence of different lengths may be repeatedly added with weights according to a predetermined rule.

In another aspect of the present invention, in a WLAN system, in a method in which a first station (STA) receives a signal from a second STA through a channel bonded to one or two channels, an Enhanced Directional Multi Gigabit (EDMG) EDMG STF transmitted in Orthogonal Frequency Division Multiplexing (OFDM) mode, which is generated based on the number of channels and space-time streams included in the bonded channel through which the PPDU (Physical Protocol Data Unit) is transmitted. And a EDMG PPDU including a Short Training Field) field from a second STA through a space time stream in which one or two channels are bonded. In this case, the EDMG STF sequence for each space time stream included in the EDMG STF field is composed of {A, 0, 0, 0, B}, and A and B differ according to the number of channels included in the bonded channel. Represents a sequence having a length, wherein A and B of each spatial temporal stream are orthogonal to A and B of another spatial temporal stream, respectively, and a nonzero value included in A and B is the number of channels included in the bonded channel. The values of the first sequence and the second sequence of different lengths may be repeatedly added with weights according to a predetermined rule.

In another aspect of the present invention, a station device for transmitting a signal through a channel bonded to one or two channels in a WLAN system, the station device has one or more RF (Radio Frequency) chain, A transceiver configured to transmit and receive a signal with another station apparatus; And a processor connected to the transceiver, the processor configured to process a signal transmitted / received with the other station device, wherein the processor includes: a bonded channel to which an Enhanced Directional Multi Gigabit (EDMG) Physical Protocol Data Unit (PPDU) is transmitted; Generating an EDMG STF (Short Training Field) field transmitted in an orthogonal frequency division multiplexing (OFDM) mode based on the number of channels and the number of space-time streams included in the method; And transmitting the EDMG PPDU including the EDMG STF field transmitted in the OFDM mode to a second STA through a spatial time stream in which one or two channels are bonded. In this case, the EDMG STF sequence for each space time stream included in the EDMG STF field is composed of {A, 0, 0, 0, B}, and A and B differ according to the number of channels included in the bonded channel. Represents a sequence having a length, wherein A and B of each spatial temporal stream are orthogonal to A and B of another spatial temporal stream, respectively, and a nonzero value included in A and B is the number of channels included in the bonded channel. The values of the first sequence and the second sequence of different lengths may be repeatedly added with weights according to a predetermined rule.

In another aspect of the present invention, a station device for receiving a signal through a channel bonded to one or two channels in a WLAN system, the station device has one or more RF (Radio Frequency) chain, A transceiver configured to transmit and receive a signal with another station apparatus; And a processor connected to the transceiver, the processor configured to process a signal transmitted / received with the other station device, wherein the processor includes: a bonded channel to which an Enhanced Directional Multi Gigabit (EDMG) Physical Protocol Data Unit (PPDU) is transmitted; One or more EDMG PPDUs including an EDMG Short Training Field (STF) field transmitted in an Orthogonal Frequency Division Multiplexing (OFDM) mode generated based on the number of channels and the number of space-time streams included therein. And a station apparatus configured to receive from a second STA through a spatial time stream in a channel in which two channels are bonded. In this case, the EDMG STF sequence for each space time stream included in the EDMG STF field is composed of {A, 0, 0, 0, B}, and A and B differ according to the number of channels included in the bonded channel. Represents a sequence having a length, wherein A and B of each spatial temporal stream are orthogonal to A and B of another spatial temporal stream, respectively, and a nonzero value included in A and B is the number of channels included in the bonded channel. The values of the first sequence and the second sequence of different lengths may be repeatedly added with weights according to a predetermined rule.

In the above configurations, the EDMG STF field may be configured with six OFDM symbol lengths.

For example, the number of channels included in the bonded channel through which the EDMG PPDU is transmitted may be one. At this time, specific technical features are as follows.

First, A and B may be composed of a 176 length sequence.

The non-zero values included in the A and B may have a configuration in which the values of the first and second sequences having lengths of 11 are repeatedly arranged with a weight according to a predetermined rule.

In addition, the space time stream is a maximum of eight, the first sequence (i) for each space time stream (i _STS )

) And second sequence (

) Are each composed of a sequence as shown in Equation 21,

[Equation 21]

Non-zero values included in A and B are determined by Equation 22, respectively.

And

Consists of a sequence such as

[Equation 22]

For each space time stream in Equation 22

May be set as shown in Table 21 below.

TABLE 21

Also, A and B of each spatial time stream may include a {0, 0, 0} sequence between non-zero values.

Specifically, A of each spatial temporal stream includes the first {0} sequence and the last {0, 0} sequence, and B of each spatial temporal stream is the first and the last {0, 0} sequence It may include a {0} sequence.

A for each space time stream (I _STS ) configured as described above is as Table 22 and Table 23,

Table 22

TABLE 23

B for each space time stream (I _STS ) may be set as shown in Tables 24 and 25 below.

TABLE 24

TABLE 25

As another example, the number of channels included in the bonded channel through which the EDMG PPDU is transmitted may be two. At this time, specific technical features are as follows.

First, A and B may be composed of a sequence of 385 lengths.

The non-zero values included in the A and B may have a configuration in which the values of the first and second sequences having a length of 3 are repeatedly arranged with a weight according to a predetermined rule.

In addition, the space time stream is a maximum of eight, the first sequence (i) for each space time stream (i _STS )

) And second sequence (

) Are each composed of a sequence as shown in Equation 23,

[Equation 23]

Non-zero values included in A and B are determined by Equation 24, respectively.

And

Consists of a sequence such as

[Equation 24]

For each space time stream in Equation 24

May be set as shown in Table 26 below.

TABLE 26

Also, A and B of each spatial time stream may include a {0, 0, 0} sequence between non-zero values.

In particular, A and B of each spatial time stream may include the {0, 0} sequence located at the front and the {0, 0} sequence located at the rear.

A for each space time stream (I _STS ) configured as described above is as Tables 27 to 30,

TABLE 27

TABLE 28

TABLE 29

TABLE 30

B for each space time stream (I _STS ) may be set as shown in Tables 31 to 34 below.

Table 31

Table 32

Table 33

Table 34

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

Through the above configuration, when a station according to the present invention transmits an OFDM packet through channels bonded with one or two channels, a low PAPR (Peak to Average Power Radio) can be implemented.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings appended hereto are for the purpose of providing an understanding of the present invention and for illustrating various embodiments of the present invention and for describing the principles of the present invention in conjunction with the description thereof.

1 is a diagram illustrating an example of a configuration of a WLAN system.

2 is a diagram illustrating another example of a configuration of a WLAN system.

3 is a diagram for describing a channel in a 60 GHz band for explaining a channel bonding operation according to an embodiment of the present invention.

4 is a diagram illustrating a basic method of performing channel bonding in a WLAN system.

5 is a view for explaining the configuration of the beacon interval.

6 is a diagram for explaining a physical configuration of an existing radio frame.

7 and 8 are views for explaining the configuration of the header field of the radio frame of FIG.

9 illustrates a PPDU structure applicable to the present invention.

10 is a diagram schematically illustrating a PPDU structure applicable to the present invention.

11 illustrates a packet preamble included in a (legacy) preamble according to the present invention.

12 to 17 are diagrams showing a Golay sequence applicable to the present invention.

18 is a diagram illustrating bandwidths of an SC packet and an OFDM packet in case of two channel bonding or four channel bonding.

19 is a case where i _STS is 1 to 4

And

20 shows a case where i _STS is 5 to 8

And

The figure which shows.

21 and 22 show each spatial time stream

And

The figure which shows.

23 is a case where i _STS is 1 or 2

And

24 shows a case where i _STS is 3 or 4

And

25 shows that i i _STS is 5 or 6

And

26 shows that i i _STS is 7 or 8

And

The figure which shows.

27 is a case where i _STS is 1 to 4

FIG. 28 shows the case where i _STS is 5 to 8

29 shows the case where i _STS is 1 to 4

30 shows that i i _STS is 5 to 8

The figure which shows.

31 is a flowchart illustrating a signal transmission method according to an embodiment of the present invention.

32 is a diagram for describing an apparatus for implementing the method as described above.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, one of ordinary skill in the art appreciates that the present invention may be practiced without these specific details. In some instances, well-known structures and devices are omitted or shown in block diagram form, centering on the core functions of each structure and device, in order to avoid obscuring the concepts of the present invention.

There may be various mobile communication systems to which the present invention is applied. Hereinafter, the WLAN system will be described in detail as an example of the mobile communication system.

One. Wireless LAN, WLAN ) system

1-1. WLAN System General

1 is a diagram illustrating an example of a configuration of a WLAN system.

As shown in FIG. 1, the WLAN system includes one or more basic service sets (BSSs). A BSS is a set of stations (STAs) that can successfully synchronize and communicate with each other.

An STA is a logical entity that includes a medium access control (MAC) and a physical layer interface to a wireless medium. The STA is an access point (AP) and a non-AP STA (Non-AP Station). Include. The portable terminal operated by the user among the STAs is a non-AP STA, and when referred to simply as an STA, it may also refer to a non-AP STA. A non-AP STA may be a terminal, a wireless transmit / receive unit (WTRU), a user equipment (UE), a mobile station (MS), a mobile terminal, or a mobile subscriber. It may also be called another name such as a mobile subscriber unit.

The AP is an entity that provides an associated station (STA) coupled to the AP to access a distribution system (DS) through a wireless medium. The AP may be called a centralized controller, a base station (BS), a Node-B, a base transceiver system (BTS), a personal basic service set central point / access point (PCP / AP), or a site controller.

BSS can be divided into infrastructure BSS and Independent BSS (IBSS).

The BBS shown in FIG. 1 is an IBSS. The IBSS means a BSS that does not include an AP. Since the IBSS does not include an AP, access to the DS is not allowed, thereby forming a self-contained network.

2 is a diagram illustrating another example of a configuration of a WLAN system.

The BSS shown in FIG. 2 is an infrastructure BSS. Infrastructure BSS includes one or more STAs and APs. In the infrastructure BSS, communication between non-AP STAs is performed via an AP. However, when a direct link is established between non-AP STAs, direct communication between non-AP STAs is also possible.

As shown in FIG. 2, a plurality of infrastructure BSSs may be interconnected through a DS. A plurality of BSSs connected through a DS is called an extended service set (ESS). STAs included in the ESS may communicate with each other, and a non-AP STA may move from one BSS to another BSS while communicating seamlessly within the same ESS.

The DS is a mechanism for connecting a plurality of APs. The DS is not necessarily a network, and there is no limitation on the form if it can provide a predetermined distribution service. For example, the DS may be a wireless network such as a mesh network or a physical structure that connects APs to each other.

Based on the above, the channel bonding method in the WLAN system will be described.

1-2. Channel in WLAN system Bonding

3 is a diagram for describing a channel in a 60 GHz band for explaining a channel bonding operation according to an embodiment of the present invention.

As shown in FIG. 3, four channels may be configured in the 60 GHz band, and a general channel bandwidth may be 2.16 GHz. The ISM bands available from 60 GHz (57 GHz to 66 GHz) may be defined differently in different countries. In general, channel 2 of the channels shown in FIG. 3 may be used in all regions and may be used as a default channel. Channels 2 and 3 can be used in most of the designations except Australia, which can be used for channel bonding. However, a channel used for channel bonding may vary, and the present invention is not limited to a specific channel.

4 is a diagram illustrating a basic method of performing channel bonding in a WLAN system.

The example of FIG. 4 illustrates the operation of 40 MHz channel bonding by combining two 20 MHz channels in an IEEE 802.11n system. For IEEE 802.11ac systems, 40/80/160 MHz channel bonding will be possible.

The two exemplary channels of FIG. 4 include a primary channel and a secondary channel, so that the STA may examine the channel state in a CSMA / CA manner for the primary channel of the two channels. If the secondary channel is idle for a predetermined time (e.g. PIFS) at the time when the primary channel idles for a constant backoff interval and the backoff count becomes zero, the STA is assigned to the primary channel and Auxiliary channels can be combined to transmit data.

However, when channel bonding is performed based on contention as illustrated in FIG. 4, channel bonding may be performed only when the auxiliary channel is idle for a predetermined time at the time when the backoff count for the primary channel expires. Therefore, the use of channel bonding is very limited, and it is difficult to flexibly respond to the media situation.

Accordingly, an aspect of the present invention proposes a method in which an AP transmits scheduling information to STAs to perform access on a scheduling basis. Meanwhile, another aspect of the present invention proposes a method of performing channel access based on the above-described scheduling or on a contention-based basis independently of the above-described scheduling. In addition, another aspect of the present invention proposes a method for performing communication through a spatial sharing technique based on beamforming.

1-3. Beacons  Configure interval

5 is a view for explaining the configuration of the beacon interval.

In an 11ad based DMG BSS system, the time of the medium may be divided into beacon intervals. Lower periods within the beacon interval may be referred to as an access period. Different connection intervals within one beacon interval may have different access rules. The information about the access interval may be transmitted to the non-AP STA or the non-PCP by an AP or a personal basic service set control point (PCP).

As shown in FIG. 5, one beacon interval may include one beacon header interval (BHI) and one data transfer interval (DTI). As shown in FIG. 4, the BHI may include a Beacon Transmission Interval (BTI), an Association Beamforming Training (A-BFT), and an Announcement Transmission Interval (ATI).

The BTI means a section in which one or more DMG beacon frames can be transmitted. A-BFT refers to a section in which beamforming training is performed by an STA that transmits a DMG beacon frame during a preceding BTI. ATI means a request-response based management access interval between PCP / AP and non-PCP / non-AP STA.

Meanwhile, as shown in FIG. 5, one or more Content Based Access Period (CBAP) and one or more Service Periods (SPs) may be allocated as data transfer intervals (DTIs). Although FIG. 5 shows an example in which two CBAPs and two SPs are allocated, this is merely an example and need not be limited thereto.

Hereinafter, the physical layer configuration in the WLAN system to which the present invention is applied will be described in detail.

1-4. Physical Layer Configuration

In the WLAN system according to an embodiment of the present invention, it is assumed that three different modulation modes may be provided.

PHY	MCS	Note
Control PHY	0
Single carrier PHY (SC PHY)	1, ..., 1225, ..., 31	(low power SC PHY)
OFDM PHY	13, ..., 24

Such modulation modes can be used to meet different requirements (eg, high throughput or stability). Depending on your system, only some of these modes may be supported.

6 is a diagram for explaining a physical configuration of an existing radio frame.

It is assumed that all DMG (Directional Multi-Gigabit) physical layers commonly include fields as shown in FIG. 6. However, there may be a difference in the method of defining individual fields and the modulation / coding method used according to each mode.

As shown in FIG. 6, the preamble of the radio frame may include a Short Training Field (STF) and a Channel Estimation (CE). In addition, the radio frame may include a data field as a header and a payload, and optionally a training field for beamforming.

7 and 8 are views for explaining the configuration of the header field of the radio frame of FIG.

Specifically, FIG. 7 illustrates a case in which a single carrier mode is used. In SC mode, the header includes information indicating the initial value of scrambling, Modulation and Coding Scheme (MCS), information indicating the length of data, information indicating whether an additional physical protocol data unit (PPDU) exists, packet type, training length, and aggregation. Information about whether to request a beam training, whether to request a last received Signal Strength Indicator (RSSI), whether to truncate, or a header check sequence (HCS). In addition, as shown in FIG. 7, the header has 4 bits of reserved bits, which may be used in the following description.

8 illustrates a specific configuration of a header when the OFDM mode is applied. The OFDM header includes information indicating an initial value of scrambling, an MCS, information indicating a length of data, information indicating whether an additional PPDU exists, packet type, training length, aggregation, beam training request, last RSSI, truncation, and HCS. (Header Check Sequence) may be included. In addition, as shown in FIG. 8, the header has 2 bits of reserved bits, and in the following description, such reserved bits may be utilized as in the case of FIG.

As described above, the IEEE 802.11ay system is considering introducing channel bonding and MIMO technology for the first time in the existing 11ad system. To implement channel bonding and MIMO in 11ay, a new PPDU structure is needed. That is, the existing 11ad PPDU structure has limitations in supporting legacy terminals and implementing channel bonding and MIMO.

To this end, a new field for the 11ay terminal may be defined after the legacy preamble and the legacy header field for supporting the legacy terminal. Here, channel bonding and MIMO may be supported through the newly defined field.

9 illustrates a PPDU structure according to one preferred embodiment of the present invention. In FIG. 9, the horizontal axis may correspond to the time domain and the vertical axis may correspond to the frequency domain.

When two or more channels are bonded, a frequency band (eg, 400 MHz band) of a predetermined size may exist between frequency bands (eg, 1.83 GHz) used in each channel. In the mixed mode, legacy preambles (legacy STFs, legacy CEs) are transmitted as duplicates through each channel. In an embodiment of the present invention, a new STF and CE are simultaneously transmitted together with the legacy preambles through a 400 MHz band between each channel. Gap filling may be considered.

In this case, as shown in FIG. 9, the PPDU structure according to the present invention transmits ay STF, ay CE, ay header B, and payload in a broadband manner after legacy preamble, legacy header, and ay header A. Has a form. Therefore, the ay header, ay Payload field, and the like transmitted after the header field may be transmitted through channels used for bonding. Hereinafter, the ay header may be referred to as an enhanced directional multi-gigabit (EDMG) header to distinguish the ay header from the legacy header, and the name may be used interchangeably.

For example, a total of six or eight channels (each 2.16 GHz) may exist in 11ay, and a single STA may bond and transmit up to four channels. Thus, the ay header and ay Payload may be transmitted through 2.16 GHz, 4.32 GHz, 6.48 GHz, 8.64 GHz bandwidth.

Alternatively, the PPDU format when repeatedly transmitting the legacy preamble without performing the gap-filling as described above may also be considered.

In this case, ay STF, ay CE, and ay header B are replaced by a legacy preamble, legacy header, and ay header A without a GF-Filling and thus without the GF-STF and GF-CE fields shown by dotted lines in FIG. 8. It has a form of transmission.

10 is a diagram schematically illustrating a PPDU structure applicable to the present invention. Briefly summarizing the above-described PPDU format can be represented as shown in FIG.

As shown in FIG. 10, the PPDU format applicable to the 11ay system includes L-STF, L-CE, L-Header, EDMG-Header-A, EDMG-STF, EDMG-CEF, EDMG-Header-B, Data, It may include a TRN field, which may be selectively included according to the type of the PPDU (eg, SU PPDU, MU PPDU, etc.).

Here, a portion including the L-STF, L-CE, and L-header fields may be referred to as a non-EDMG portion, and the remaining portion may be referred to as an EDMG region. In addition, the L-STF, L-CE, L-Header, and EDMG-Header-A fields may be called pre-EDMG modulated fields, and the rest may be called EDMG modulated fields.

The (legacy) preamble portion of the PPDU includes packet detection, automatic gain control (AGC), frequency offset estimation, synchronization, modulation (SC or OFDM) indication, and channel measurement. (channel estimation) can be used. The format of the preamble may be common for the OFDM packet and the SC packet. In this case, the preamble may include a Short Training Field (STF) and a Channel Estimation (CE) field located after the STF field. (The preamble is the part of the PPDU that is used for packet detection, AGC, frequency offset estimation, synchronization, indication of modulation (SC or OFDM) and channel estimation.The format of the preamble is common to both OFDM packets and SC packets .The preamble is composed of two parts: the Short Training field and the Channel Estimation field.)

11 illustrates a packet preamble included in a (legacy) preamble according to the present invention.

The STF consists of a structure in which a length of ₁₂₈ Ga ₁₂₈ (n) sequences is 16 repetitions, followed by one -Ga ₁₂₈ (n) sequence. (The Short Training field is composed of 16 repetitions of sequences Ga ₁₂₈ (n) of length 128, followed by a single repetition of -Ga ₁₂₈ (n).) In this case, the waveform for the STF is expressed by the following equation. Can be represented.

Golay sequences (e.g. Ga ₁₂₈ (n), Gb ₁₂₈ (n), Ga ₆₄ (n), Gb ₆₄ (n), Ga ₃₂ (n), Gb ₃₂ (b)) are preamble, single It is used for a single carrier guard interval, beam refinement TRN-R / T and ACG fields. The golay sequence may be called a pair of complementary sequences. The subscript written below indicates the length of the sequence. The sequences are generated using the following recursive procedure. (The following Golay sequences are used in the preamble, in the single carrier guard interval and in beam refinement TRN-R / T and AGC fields: Ga ₁₂₈ (n), Gb ₁₂₈ (n), Ga ₆₄ (n), Gb ₆₄ (n), Ga ₃₂ (n), Gb ₃₂ (n) .These are 3 pairs of complementary sequences.The subscript denotes the length of the sequences.These sequences are generated using the following recursive procedure :)

Here, when n <0 or n ≧ 2 ^k , A _k (n) and B _k (n) have a value of zero.

When D _k = [1 8 2 4 16 32 64] (k = 1,2, ..., 7) and W _k = [-1 -1 -1 -1 +1 -1 -1] in the above procedure , Ga ₁₂₈ (n) = A ₇ (128-n) and Gb ₁₂₈ (n) = B ₇ (128-n). (Ga ₁₂₈ (n) = A ₇ (128-n), Gb ₁₂₈ (n) = B ₇ (128-n) when the procedure uses D _k = [1 8 2 4 16 32 64] (k = 1,2 ,…, 7) and W _k = [-1 -1 -1 -1 +1 -1 -1].)

Or, if D _k = [2 1 4 8 16 32] and W _k = [1 1 -1 -1 1 -1] in the above procedure, then Ga ₆₄ (n) = A ₆ (64-n) and Gb ₆₄ (n) = B ₆ (64-n). (Ga ₆₄ (n) = A ₆ (64-n)), Gb ₆₄ (n) = B ₆ (64-n) when the procedure uses D _k = [2 1 4 8 16 32] and W _k = [1 1 -1 -1 1 -1].)

Alternatively, when D _k = [1 4 8 2 16] and W _k = [-1 1 -1 1 -1] in the above procedure, Ga ₃₂ (n) = A ₅ (32-n) and Gb ₃₂ (n) = B ₅ (32-n). (Ga ₃₂ (n) = A ₅ (32-n)), Gb ₃₂ (n) = B ₅ (32-n) when the procedure uses D _k = [1 4 8 2 16] and W _k = [-1 1 -1 1 -1].)

Each of the above-described sequences may be represented as shown in FIGS. 12 to 17. The sequences in the tables are normative, the description above is informative.

12 to 17 are diagrams illustrating a Golay sequence applicable to the present invention.

3. Applicable to the present invention Example

The PPDU format shown in FIG. 10 may be applied to the PPDU format of the 11ay system to which the present invention is applicable. In this case, the AGC field may be additionally included in the region between the Data field and the TRN field.

At this time, each field may be defined as follows.

Field	Description
L-STF	Non-EDMG Short Training field
L-CEF	Non-EDMG Channel Estimation field
L-Header	Non-EDMG Header field
EDMG-Header-A	EDMG Header A field
EDMG-STF	EDMG Short Training field
EDMG-CEF	EDMG CHannel Estimation field
EDMG-Header-B	EDMG Header B field
Data	The Data field carriers the PSDU (s)
AGC	Automatic Gain Control field
TRN	Training sequences field

When the STA according to the present invention operates according to a Single Input Single Output (SISO) scheme using a single channel, EDMG-STF and EDMG-CEF of Table 2 may not be transmitted.

Hereinafter, a method of designing an EDMG-STF for an OFDM packet (or for an OFDM transmission mode) is proposed based on the above technical configurations. Specifically, the present invention proposes a method of designing EDMG-STF for OFDM packets in consideration of the following criteria. Hereinafter, the criteria considered in the present invention are as follows.

(1) frequency / time dimension sequence  (Frequency / time domain sequence)

The EDMG-STF for the OFDM packet may be composed of a sequence generated in the time dimension and transmitted. For example, the EDMG-STF for the OFDM packet may be defined as a DMG-STF defined in the 11ad system, or a new Golay sequence, or an EDMG-STF for a single carrier (SC) defined in the 11ay system. Can be.

As a method for matching the bandwidths occupied by the OFDM packet and the sequence defined for these methods, the resampling method used in the 11ad system may be modified or a new sampling rate may be defined. Can be used. However, such a configuration can be a huge burden in practice.

Accordingly, the present invention proposes a method that is compatible with the EDMG-CEF by generating a sequence corresponding to the EDMG-STF in the frequency domain. Through this, the bandwidths for the payload also coincide with each other, so that the STA can perform more accurate AGC.

18 is a diagram illustrating bandwidths of an SC packet and an OFDM packet in case of two channel bonding or four channel bonding.

As shown in FIG. 18, when a plurality of channels are bonded, the bandwidth of the SC packet and the OFDM packet is 0.47 GHz (for example, in case of 2CB, see (a) of FIG. 18) or 1.28 GHz according to the number of bonded channels. In the case of 4CB, the bandwidth may vary as shown in (b) of FIG. 18. Accordingly, the STA may not perform accurate AGC. As mentioned above, this phenomenon increases as the number of bonded channels increases.

(2) Legacy  Processing time for L-Header decoding

EDMG-STF for SC packet is designed with 18 Ga ₁₂₈ * N _CB sequences and 1 -Ga ₁₂₈ * N _CB sequences in consideration of the processing time of DMG header. At this time, the total time occupied by 18 + 1 sequences is about 1.3818us. Here, N _CB represents the number of channels used for channel bonding as a channel bonding factor.

As such, the EDMG-STF for the OFDM packet proposed in the present invention may also be designed in consideration of the processing time of the DMG header. In this case, assuming that the length (T _DFT + T _GI ) of one OFDM symbol is 0.2424us, six or more OFDM symbols may be required for decoding the legacy header. This is because 1.3818us / 0.2424us = 5.7. Accordingly, the present invention proposes to configure the EDMG-STF using six OFDM symbols.

(3) for SC EDMG - STF and  Compatible structure to EDMG - STF  for SC)

As described above, the EDMG-STF for SC may have a structure repeated four times in one single carrier block using Ga128 (when N _CB = 1). Here, the repeated structure and number may affect the AGC and synchronization performance. Accordingly, the EDMG-STF for OFDM according to the present invention may also have a structure that is repeated four times during one DFT / IDFT period so as to be similar to the performance requirement of the SC.

Herein, a structure in which a specific sequence is repeated four times during one DFT / IDFT period has a specific sequence of 5 during one OFDM symbol period, considering that the CP (Cyclic Prefix) length of the 11ad system is T _DFT / 4. The advantage is that it can take a uniform structure over and over again.

As such, in order to have a structure in which a specific sequence is repeated four times in the time domain during the DFT / IDFT period, the EDMG-STF for OFDM has a structure in which three zeros are repeatedly inserted in the frequency domain. Can have

(4) HW complexity

As a method for reducing hardware complexity, a non-zero value included in the EDMG-STF sequence proposed in the present invention may have one of + 1, -1, + j, -j.

(5) MIMO  For support Orthogonality  ( Orthogonality  for MIMO )

In order to support MIMO transmission, the sequences for each spatial stream according to the present invention may be designed to be orthogonal to each other.

(6) PAPR  Peak to Average Power Ratio performance PAPR  performance)

For reliable signal transmission and reception, sequences according to the present invention can be designed to minimize PAPR. In particular, the EDMG-STF according to the present invention may be designed to have a PAPR similar to the PAPR (eg, 3.12 dB) of the DMG-CEF of the 11ad system.

Hereinafter, a sequence applicable to the case where one or two channels are bonded in consideration of the various criteria described above and a method of generating the sequence will be described in detail.

Here, the EDMG-STF according to the present invention has a fixed time size (for example, 6 OFDM symbol interval). In this case, the fixed time size may be set independently of the number of space-time streams.

The structure of the EDMG-STF field according to the present invention may be determined based on the number of consecutive channels (eg, 2.16 GHz channels) on which the EDMG PPDU is transmitted and the number of space-time streams.

3.1. single If channel For OFDM EDMG - Of STF sequence

For EDMG OFDM transmission over a single channel (eg, 2.16 GHz), the frequency sequence (or frequency domain signal) used to construct the EDMG STF field for the i _STS ^th space-time stream can be expressed as the following equation.

At this time, for each space time stream

And

May be defined as shown in FIGS. 19 and 20. More specifically, FIG. 19 shows a case where i _STS is 1 to 4

And

20 shows a case where i _STS is 5 to 8

And

Indicates.

When generalizing each sequence of Equation 3 and FIGS. 19 and 20, the sequence for each space time stream may be expressed as follows.

At this time, for each space time stream

And

May be defined as shown in FIGS. 21 and 22, respectively.

In the above equations, i _STS denotes a space-time stream index, and a subscript denotes the length of each sequence. In addition, three zero values located in the middle of the equations may mean a null carrier for DC elimination of direct current offset.

Additionally, the frequency domain signal for each space time stream constituting the EDMG-STF field for EDMG OFDM transmission through a single channel may further include a predetermined number of zeros as guard carriers. For example, 79 zeros may be added before the above-described equations, and 78 zeros may be added after the above-mentioned equations.

Meanwhile, as a scheme for preventing unintentional beamforming generated when the same signal is transmitted in each stream during MIMO transmission, sequences for each spatial time stream proposed in the present invention may be designed to be orthogonal to each other. have.

Hereinafter, as an example applicable to the present invention, an example for generating the above-described sequences will be described in detail. In the present invention, the STA according to the present invention may utilize a sequence generation method to be described later, a sequence information (or table information) stored in a separate storage device, or various other methods to generate the sequence. . Accordingly, the STA according to the present invention may utilize the above-described specific sequences to configure the EDMG-STF field, but may not generate the sequences according to the following method but may be generated and used according to another method.

For example, each spatial time stream defined as shown in Equation 3 and FIGS. 19 and 20 described above.

And

Can be derived according to the following procedure.

first,

And

May be defined as in the following equation. At this time,

Is

Means the nth value of,

Is

It can mean the nth value of.

In Equation 5,

And

Can be generated through a recursive procedure such as the following equation.

Where k denotes an iteration index,

The i-th _STS-space represents the weight (the weight for _STS sequence of i -th space-time stream and k-th iteration) for the sequence and k-th iteration of the time stream.

For each space-time stream

Vectors can be represented as shown in Table 3.

As shown in the table, for each space-time stream

In case of constructing a vector, the PAPR for each spatial temporal stream is as follows.

Space-time stream number	PAPR (dB)
One	3.00
2	2.99
3	2.99
4	3.00
5	2.99
6	3.00
7	3.00
8	3.00

At this time, considering that the DMG-CEF has 3.12 dB, it can be seen that the EDMGD-STF according to the present invention has excellent performance.

3.2. 2 channel Bonding Inn  Case, for OFDM EDMG - Of STF sequence

For EDMG OFDM transmission using a channel with two channels bonded (e.g., a single 4.32 GHz), the frequency sequence (or frequency domain signal) used to construct the EDMG STF field for the i _STS ^th space-time stream is given by the equation Can be expressed as:

At this time, for each space time stream

And

May be defined as shown in FIGS. 23 to 26. More specifically, FIG. 23 shows a case where i _STS is 1 or 2

And

24 shows a case where i _STS is 3 or 4

And

25 shows that i i _STS is 5 or 6

And

26 shows that i i _STS is 7 or 8

And

Indicates.

To sum up the sequence of Equation 7 and FIGS. 23 to 26 more simply, the sequence for each space time stream can be expressed as follows.

At this time, for each space time stream

And

Are each equal to {0,

} And {

, 0}. Accordingly, each space time stream

And

May be defined as shown in FIGS. 27 to 30. Specifically, FIG. 27 shows the case where i _STS is 1 to 4.

FIG. 28 shows the case where i _STS is 5 to 8

29 shows the case where i _STS is 1 to 4

30 shows that i i _STS is 5 to 8

Indicates.

In the above-described equations, i _STS denotes a spatial temporal stream index, and a subscript denotes the length of each sequence. In addition, three zero values located in the middle of the above equations represent a null carrier for direct current (DC) offset cancellation.

Meanwhile, as a scheme for preventing unintentional beamforming generated when the same signal is transmitted in each stream during MIMO transmission, sequences for each spatial time stream proposed in the present invention may be designed to be orthogonal to each other. have.

Hereinafter, as an example applicable to the present invention, an example for generating the above-described sequences will be described in detail. In other words, the STA according to the present invention may utilize a sequence generation method to be described later, a sequence information (or table information) stored in a separate storage device, or various other methods to generate the sequence. Accordingly, the STA according to the present invention may utilize the above-described specific sequences to configure the EDMG-STF field, but may not generate the sequences according to the following method but may be generated and used according to another method.

For example, each spatial time stream defined as shown in Equation 7 and FIGS. 24 to 26 described above.

And

Can be derived according to the following procedure.

first,

And

May be defined as in the following equation. At this time,

Is

Means the nth value of,

Is

It can mean the nth value of.

In Equation 9,

And

Can be generated through a recursive procedure such as the following equation.

Where k denotes an iteration index,

The i-th _STS-space represents the weight (the weight for _STS sequence of i -th space-time stream and k-th iteration) for the sequence and k-th iteration of the time stream.

For each space-time stream

Vectors can be represented as shown in Table 5.

In addition, in Equation 10,

instead

This can be applied.

Or in equation (10),

And

An element value which is an inverse order of an element disclosed in Equation 10 may be applied to. According to this,

And

It can be expressed as

Meanwhile, each space time stream

As vectors, elements satisfying mutual orthogonality may be applied. For example, unlike Table 5, for each space-time stream

The elements constituting the vector may be complex numbers including imaginary numbers.

As shown in the table above, each spatial time stream

In case of constructing a vector, the PAPR for each spatial temporal stream is as follows.

Space-time stream number	PAPR (dB)
One	2.99
2	3.00
3	3.00
4	3.00
5	2.99
6	3.00
7	3.00
8	3.00

In the above configurations, the EDMG-STF field transmit waveform in the time domain has an OFDM sampling rate of F _s = N _CB * 2.64 GHz and a time interval of T _s = 1 / F _s In the case of ns, it may be defined as follows. (The EDMG-STF field transmit waveform in time domain shall be defined at the OFDM sampling rate F _s equal to N _CB × 2.64 GHz and sample time duration T _s = 1 / F _s ns as follows :)

here,

Is 88, 192, 296, 400 for N _CB = 1, 2, 3 and 4, respectively,

Is the spatial mapping matrix for each k-th subcarrier,

Denotes a matrix element of the m th row and the n th column.

Denotes a window function applied to mitigate transitions between successive OFDM symbols, the definition of which may be implementation dependent. (

is a window function applied to smooth the transitions between consecutive OFDM symbols, whose definition is implementation dependent.)

31 is a flowchart illustrating a signal transmission method according to an embodiment of the present invention.

First, the station according to the present invention generates an EDMG STF field transmitted in the OFDM mode (or for the OFDM packet) based on the number of channels included in the bonded channel through which the EDMG PPDU is transmitted and the number of spatial time streams (S3110). ).

At this time, the EDMG STF sequence for each space time stream included in the EDMG STF field may be configured as {A, 0, 0, 0, B}. Specifically, when the number of bonded channels is one, A and B may be configured in a sequence of 176 lengths, and when the number of bonded channels is two, the A and B may be configured in a sequence of 385 lengths. .

In this case, up to eight space time streams may be configured, and A and B for each space time stream may be orthogonal to A and B of other space time streams, respectively. In other words, A (or B) for the first space time stream may be set to be orthogonal to A (or B) for the second space time stream.

As a specific example, when the number of channels included in the bonded channel is one, A and B for each space time stream may be configured as shown in FIGS. 21 and 22. Alternatively, when the number of channels included in the bonded channel is two, each of the space time streams A and B may be configured as shown in FIGS. 27 to 30.

Here, the EDMG STF field may be configured with six OFDM symbol lengths.

In the present invention, non-zero values included in the A and B are repeated values of the first sequence and the second sequence having different lengths according to a predetermined rule depending on the number of channels included in the bonded channel. It may have a configuration arranged.

First, specific technical features of the case where the number of channels included in the bonded channel through which the EDMG PPDU is transmitted is one is as follows.

The non-zero values included in the A and B may be set in such a way that the values of the first and second sequences having lengths of 11 are repeatedly arranged with a weight according to a predetermined rule.

At this time, the space time stream is composed of a maximum of eight, each of the first sequence for each space time stream (i _STS ) (

) And second sequence (

) May be configured in a sequence as shown in Equation 12 below.

Here, the non-zero values included in A and B are each determined by Equation 13 below.

And

It can be composed of a sequence such as.

In addition, for each space time stream in Equation 13

May be set as shown in the following table.

Here, A and B of each spatial time stream may include a {0, 0, 0} sequence between non-zero values.

Specifically, A of each spatial temporal stream includes the first {0} sequence and the last {0, 0} sequence, and B of each spatial temporal stream is the first and the last {0, 0} sequence It may include a {0} sequence. In more detail, as shown in FIGS. 19 to 22, the entire sequence corresponding to A for each space time stream includes one '0' sequence located at the front and two '0' sequences located at the rear, The entire sequence corresponding to B for each space time stream may include two '0' sequences located at the front and one '0' sequence located at the rear.

Next, specific technical features of the case where the number of channels included in the bonded channel through which the EDMG PPDU is transmitted are two as follows.

Non-zero values included in the A and B may be set to a configuration in which the values of the first and second sequences having a length of 3 are repeatedly arranged with a weight according to a predetermined rule.

At this time, the space time stream is composed of a maximum of eight, each of the first sequence for each space time stream (i _STS ) (

) And second sequence (

) May each be configured in a sequence as shown in Equation 14 below.

Herein, the non-zero values included in A and B are determined by Equation 15, respectively.

And

It can be composed of a sequence such as.

In addition, for each space time stream in Equation 5

May be set as shown in the following table.

Here, A and B of each spatial time stream may include a {0, 0, 0} sequence between non-zero values.

In particular, A and B of each spatial time stream may include the {0, 0} sequence located at the front and the {0, 0} sequence located at the rear. More specifically, as shown in FIGS. 23 to 30, the entire sequence corresponding to A and B for each space time stream includes two '0' sequences located at the front and two '0' sequences located at the rear. can do.

Subsequently, the station transmits an EDMG PPDU including an EDMG STF field transmitted in the OFDM mode to another station through a spatial time stream in a channel in which one or two channels are bonded (S3120).

4. Device Configuration

32 is a diagram for describing an apparatus for implementing the method as described above.

The wireless device 100 of FIG. 32 may correspond to an initiator STA transmitting a signal described in the above description, and the wireless device 150 may correspond to a responder STA receiving the signal described in the above description. In this case, each station may correspond to an 11ay terminal or a PCP / AP. Hereinafter, for the convenience of description, the initiator STA transmitting a signal is called a transmitting device 100, and the responder STA receiving a signal is called a receiving device 150.

The transmitter 100 may include a processor 110, a memory 120, and a transceiver 130, and the receiver device 150 may include a processor 160, a memory 170, and a transceiver 180. can do. The transceiver 130 and 180 may transmit / receive a radio signal and may be executed in a physical layer such as IEEE 802.11 / 3GPP. The processors 110 and 160 are executed in the physical layer and / or the MAC layer and are connected to the transceivers 130 and 180.

The processors 110 and 160 and / or the transceivers 130 and 180 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processors. The memory 120, 170 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and / or other storage unit. When an embodiment is executed by software, the method described above can be executed as a module (eg, process, function) that performs the functions described above. The module may be stored in the memories 120 and 170 and may be executed by the processors 110 and 160. The memories 120 and 170 may be disposed inside or outside the processes 110 and 160, and may be connected to the processes 110 and 160 by well-known means.

The detailed description of the preferred embodiments of the invention disclosed as described above is provided to enable any person skilled in the art to make and practice the invention. Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will understand that the present invention can be variously modified and changed from the above description. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

As described above, the present invention has been described assuming that it is applied to an IEEE 802.11-based WLAN system, but the present invention is not limited thereto. The present invention can be applied in the same manner to various wireless systems capable of data transmission based on channel bonding.

Claims (17)

1. A method for transmitting a signal through a channel in which one or two channels are bonded to a second STA by a first station (STA) in a WLAN system,

   EDMG (Enhanced Directional Multi Gigabit) Transmits in Orthogonal Frequency Division Multiplexing (OFDM) mode based on the number of channels and space-time streams included in the bonded channel on which the Physical Protocol Data Unit (PPDU) is transmitted Generate an EDMG STF (Short Training Field) field; And

   Transmitting an EDMG PPDU including an EDMG STF field transmitted in the OFDM mode to a second STA through a spatial time stream in a channel bonded with one or two channels;

   The EDMG STF sequence for each spatial temporal stream included in the EDMG STF field is composed of {A, 0, 0, 0, B}, and A and B have different lengths according to the number of channels included in the bonded channel. Represents a sequence that has

   A and B of each space time stream are orthogonal to A and B of another space time stream, respectively,

   Non-zero values included in the A and B have a configuration in which the values of the first sequence and the second sequence having different lengths are repeatedly added with weights according to a predetermined rule according to the number of channels included in the bonded channel. , Signal transmission method.
2. The method of claim 1,

   The EDMG STF field consists of 6 OFDM symbol lengths.
3. The method of claim 1,

   When the number of channels included in the bonded channel to which the EDMG PPDU is transmitted is one,

   And A and B are 176 long sequences.
4. The method of claim 3, wherein

   When the number of channels included in the bonded channel to which the EDMG PPDU is transmitted is one,

   The non-zero value included in the A and B has a configuration in which the values of the first sequence and the second sequence having lengths of 11 are repeatedly arranged by being weighted according to a predetermined rule.
5. The method of claim 4, wherein

   The space time stream is up to eight,

   When the number of channels included in the bonded channel to which the EDMG PPDU is transmitted is one,

   A first sequence for each space time stream (i _STS )

   

   ) And second sequence (

   

   Are each composed of a sequence as shown in Equation 41,

   [Equation 41]

   

   Non-zero values included in A and B are determined by Equation 42, respectively.

   

   And

   

   Consists of a sequence such as

   [Equation 42]

   

   For each space time stream in Equation 2

   

   The signal transmission method is set as shown in Table 41 below.

   Table 41

   
6. The method of claim 4, wherein

   A and B of each spatial time stream comprise a {0, 0, 0} sequence between non-zero values.
7. The method of claim 6,

   When the number of channels included in the bonded channel to which the EDMG PPDU is transmitted is one,

   A of each spatial temporal stream includes the first {0} sequence and the last {0, 0} sequence,

   B of each space time stream includes the most recently sequenced {0, 0} and the most recently sequenced {0}.
8. The method of claim 3, wherein

   The space time stream is up to eight,

   When the number of channels included in the bonded channel on which the EDMG PPDU is transmitted is one, A for each _STS is as shown in Tables 42 and 43,

   Table 42

   

   Table 43

   

   B for each space time stream (I _STS ) is set as shown in Tables 44 and 45 below.

   Table 44

   

   TABLE 45

   
9. The method of claim 1,

   When the number of channels included in the bonded channel to which the EDMG PPDU is transmitted is two,

   And A and B are 385 long sequences.
10. The method of claim 9,

    When the number of channels included in the bonded channel to which the EDMG PPDU is transmitted is two,

    The non-zero value included in the A and B has a configuration in which the values of the first and second sequences having a length of 3 are repeatedly arranged with a weight according to a predetermined rule.
11. The method of claim 10,

    The space time stream is up to eight,

    When the number of channels included in the bonded channel to which the EDMG PPDU is transmitted is two,

    A first sequence for each space time stream (i _STS )

    

    ) And second sequence (

    

    ) Are each composed of a sequence such as the following Equation 43,

    [Equation 43]

    Non-zero values included in A and B are determined by Equation 44, respectively.

    

    And

    

    Consists of a sequence such as

    [Equation 44]

    

    For each space time stream in Equation 44

    

    The signal transmission method is set as shown in Table 46 below.

    TABLE 46

    
12. The method of claim 10,

    A and B of each spatial time stream comprise a {0, 0, 0} sequence between non-zero values.
13. The method of claim 12,

    When the number of channels included in the bonded channel to which the EDMG PPDU is transmitted is two,

    A and B of each spatial time stream each include a sequence of {0, 0} located at the front and a sequence of {0, 0} located at the rear.
14. The method of claim 9,

    The space time stream is up to eight,

    When the number of channels included in the bonded channel to which the EDMG PPDU is transmitted is two, A for each _STS is as shown in Tables 47 to 50 below.

    TABLE 47

    

    TABLE 48

    

    Table 49

    

    TABLE 50

    

    B for each space time stream (I _STS ) is set as shown in Tables 51 to 54 below.

    Table 51

    

    Table 52

    

    Table 53

    

    TABLE 54

    
15. In a WLAN system, a first station (STA) receives a signal from a second STA through a channel bonded one or two channels,

    Orthogonal Frequency Division Multiplexing (OFDM) mode based on the number of channels and the number of space-time streams included in the bonded channel through which EDMG (Enhanced Directional Multi Gigabit) PPDU (Physical Protocol Data Unit) is transmitted Receiving an EDMG PPDU including an EDMG Short Training Field (STF) field transmitted from a second STA through a spatial time stream in a channel to which the one or two channels are bonded;

    The EDMG STF sequence for each spatial temporal stream included in the EDMG STF field is composed of {A, 0, 0, 0, B}, and A and B have different lengths according to the number of channels included in the bonded channel. Represents a sequence that has

    A and B of each space time stream are orthogonal to A and B of another space time stream, respectively,

    Non-zero values included in the A and B have a configuration in which the values of the first sequence and the second sequence having different lengths are repeatedly added with weights according to a predetermined rule according to the number of channels included in the bonded channel. , Signal receiving method.
16. A station apparatus for transmitting a signal through a channel in which one or two channels are bonded in a WLAN system,

    A transceiver having one or more RF (Radio Frequency) chains and configured to transmit and receive a signal with another station apparatus; And

    It is connected to the transceiver, and includes a processor for processing a signal transmitted and received with the other station device,

    The processor,

    EDMG (Enhanced Directional Multi Gigabit) Transmits in Orthogonal Frequency Division Multiplexing (OFDM) mode based on the number of channels and space-time streams included in the bonded channel on which the Physical Protocol Data Unit (PPDU) is transmitted Generate an EDMG STF (Short Training Field) field; And

    Transmit an EDMG PPDU including an EDMG STF field transmitted in the OFDM mode to a second STA through a spatial time stream in a channel to which the one or two channels are bonded;

    The EDMG STF sequence for each spatial temporal stream included in the EDMG STF field is composed of {A, 0, 0, 0, B}, and A and B have different lengths according to the number of channels included in the bonded channel. Represents a sequence that has

    A and B of each space time stream are orthogonal to A and B of another space time stream, respectively,

    Non-zero values included in the A and B have a configuration in which the values of the first sequence and the second sequence having different lengths are repeatedly added with weights according to a predetermined rule according to the number of channels included in the bonded channel. Station device.
17. A station apparatus for receiving a signal through a channel in which one or two channels are bonded in a WLAN system,

    A transceiver having one or more RF (Radio Frequency) chains and configured to transmit and receive a signal with another station apparatus; And

    It is connected to the transceiver, and includes a processor for processing a signal transmitted and received with the other station device,

    The processor,

    Orthogonal Frequency Division Multiplexing (OFDM) mode based on the number of channels and the number of space-time streams included in the bonded channel through which EDMG (Enhanced Directional Multi Gigabit) PPDU (Physical Protocol Data Unit) is transmitted Receive an EDMG PPDU including an EDMG Short Training Field (STF) field transmitted from a second STA through a spatial time stream in a channel to which the one or two channels are bonded;

    The EDMG STF sequence for each spatial temporal stream included in the EDMG STF field is composed of {A, 0, 0, 0, B}, and A and B have different lengths according to the number of channels included in the bonded channel. Represents a sequence that has

    A and B of each space time stream are orthogonal to A and B of another space time stream, respectively,

    Non-zero values included in the A and B have a configuration in which the values of the first sequence and the second sequence having different lengths are repeatedly added with weights according to a predetermined rule according to the number of channels included in the bonded channel. Station device.

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